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SECTION 2 Scientific Knowledge and Applications Instructions to Candidates Please read this page carefully, but do not open the question paper until you are told that you may do so. This paper is Section 2 of 3. Your supervisor will collect this question paper and answer sheet before giving out Section 3. A separate answer sheet is provided for this section. Please check you have one. You also require a soft pencil and an eraser. Please complete the answer sheet with your:
• BMAT candidate number • Centre number • Date of birth • Name
Speed as well as accuracy is important in this section. Work quickly, or you may not finish the paper. There are no penalties for incorrect responses, only marks for correct answers, so you should attempt all 27 questions. Each question is worth one mark. Answer on the sheet provided. Questions ask you to show your choice between options by shading a circle. If you make a mistake, erase thoroughly and try again. Any rough work should be done on this question paper. Calculators are NOT permitted.
Please wait to be told you may begin before turning this page.
This paper consists of 20 printed pages and 4 blank pages. PV4
3 A student carries out an experiment to determine the density of the material from which two identical solid objects are made. She uses a balance and a measuring cylinder containing a fixed volume of liquid. The diagrams show different stages of her experiment, with some of the readings on the balance and some on the measuring cylinder.
20 g 470g170g
250 cm3
350 cm3
Which calculation should be used to determine the density of the material from which the objects are made?
4 A straight line passes through the points P ( 3,− 3) and Q (6, 9). Which one of the following is an equation of a straight line which is parallel to PQ?
7 Nickel has an atomic number of 28. The mass numbers of four of its isotopes are 58, 60, 61 and 62. Below are three statements about these isotopes of nickel.
1 All of them have the same chemical properties.
2 All of them have nuclei containing 28 protons.
3 One of them has a nucleus that contains 62 neutrons.
Which statement(s) is/are correct? A 1 only
B 2 only
C 3 only
D 1 and 2 only
E 1 and 3 only
F 2 and 3 only
G 1, 2 and 3
H none of them 8 The mean mass of a group of N people is 75 kg.
Jim, Karen and Leroy join this group, without anyone leaving; the new mean mass is 78 kg. The mean mass of Jim, Karen and Leroy is 90 kg. What is the value of N?
11 An AC voltage is induced in a coil of wire when it is rotated in a magnetic field. This voltage can be displayed on the screen of an instrument called an oscilloscope, which shows the variation of the induced voltage on the y-axis plotted against time on the x-axis. The oscilloscope trace below is the result of rotating a coil at a constant speed in a uniform magnetic field.
x
y
Which one of the following traces would result from rotating the coil at a faster constant speed, whilst keeping all other conditions unchanged? (The scales on the axes do not change.)
15 The diagram represents a satellite communication link between two points on Earth. The distances between the transmitting station, the satellite and the receiving station are shown. The frequency of the waves used for the link can be taken as 1.5 × 1010 Hz, and the speed of light as 3.0 × 108 m / s.
satellite
45 000 km
receivingstation
Earth
45 000 km
transmitting station
[not to scale]
What type of wave is used in such a link, and what is the time delay between a signal being transmitted and then being received at the receiving station?
22 Calcium carbonate reacts with hydrochloric acid. The reaction gives off carbon dioxide gas. Line X on the graph shows the volume of carbon dioxide formed against time when 100 cm3 of 1.0 mol dm–3 of hydrochloric acid reacts with calcium carbonate chips at C.20° There was an excess of calcium carbonate chips.
CaCO3 + 2HCl → CaCl2 + CO2 + H2O(l) Which line best represents the volume of carbon dioxide formed against time when the reaction is repeated with 50 cm3 of 2.0 mol dm–3 of hydrochloric acid reacting with excess calcium carbonate chips at C?20°
23 An object that has a weight of 15 N on Earth is taken to a planet where it has a weight of 3.0 N. The planet has no atmosphere. Which line in the table correctly shows the mass of the object on the planet, and the kinetic energy it gains after falling from rest near the surface of the planet through a vertical distance of 10 m? (Take the gravitational field strength g on Earth to be 10 N / kg.)
24 Some blood is found at a crime scene. The police know that it belongs to the one criminal involved. A person’s red blood cells can have type A antigens, type B antigens, both types or neither type. In a population: 45% of people have type A antigens but not type B 9% of people have type B antigens but not type A 43% of people have neither type of antigen 3% of people have both types of antigen An antibody test shows that there are type B antigens present in the red blood cells at the crime scene. What is the probability that the criminal’s red blood cells have both type A and type B antigens?
25 An experiment was carried out to investigate a gene for coat colour in mice. The diagram shows the results of three crosses between different mice, producing three different families, P, Q and R.
female femalemale male
family Q
family Rfamily P
X X X
female
female
female
female
X X X
What is the maximum possible number of heterozygous mice shown in the diagram?
26 The gases X and Y react with each other to produce gas Z according to the equation:
2X(g) + Y(g) → 2Z(g) 100 cm3 of X was mixed with 10 cm3 of Y, in a freely moving gas syringe sealed with a rubber cap. The reaction went to completion. All volumes were measured at the same temperature and pressure.
gas syringe
rubber cap What is the final volume of gas in the syringe?
A 20 cm3
B 55 cm3
C 80 cm3
D 100 cm3
E 110 cm3
F 120 cm3
27 Light travels through glass at a speed which is 32
of its speed through air.
Light travels through water at a speed which is 43
of its speed through air.
A ray of light has a wavelength of 360 nm when travelling through water. What is the wavelength of this ray of light when travelling through glass?